Lakes Alumine, Caburgua, and Colico, Chile January 1998. Surrounded by forested mountains, Lakes Caburgua and Colico formed inside glacial troughs that descended from the Andes Mountains into the forelands. Though Lake Alumine evolved the same way, its location is on the lee or dry side of the Andes Mountains prevents the growth of forests around the lake. The glaciers built terminal moraines, behind which the melting waters were dammed during deglaciation nearly 12000 years ago. All of the lakes enjoy a balanced water budget and clean water due to the snowmelt in the Andes. These lakes are also rich in sports fish, particularly trout which are stocked in the Andean lakes. The region is a renowned tourist attraction. The snow-capped peak near the bottom center portion of the image is Llaima Volcano. This 10252 foot (3124 meters) volcano is a stratovolcano that last erupted in late August early September, 1992. The volcano has been very active in historical times.. Source: National Aeronautics and Space Administration - NASA/JPL/NIMA